Drop the cover off the bottom of the bellhousing and turn the engine by using a big screwdriver or the chisel tip of a short shepherd's crook pry bar in the flywheel teeth. You might have to enlist a volunteer to do the turning or observe the valve action- - -hard to be underneath and watch the valves at the same time. The failure of the distributor to drop all the way in means the tab on the distributor shaft isn't engaging the slot on the oil pump drive. Use a screwdriver to rotate the oil pump a little so the dizzy will drop in, but be absolutely sure the #1 cylinder is on TDC compression.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!